Partitions

Partitioning of your hard drive(s) can be as trivial as creating just
two partitions, one for swap and the rest for the installation and
everything else--this is the Debian default and recommendation for
new users. Or it can be as complex as creating many partitions for
different parts of the system to use. An argument for creating
multiple partitions is that filling up one partition won't impact on
other partitions (which could be a problem if the system is unable to
function properly because the disk is full). Also, corrupting one
partition (although rare) won't affect another, thus it is good to
keep the system partition separate from the user partitions. Finally,
having all user files (e.g., /home) on its own partition can
mean that you can reinstall the operating system without wiping out
the user files. The decision is yours.